InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Speciation as a smallseries of changes thataccumulate over time, ia known asA. punchuated eequilibriumB. cladisticsC. gradualismD. stasis |
| Answer» Correct Answer - C | |
| 2. |
Sympatric speciation occurs most commonly inA. mammalsB. fishesC. plantsD. birds |
| Answer» Correct Answer - C | |
| 3. |
Assertion Disruptive selection is the rarest form of selection Reason Disruptive selection leads to speciationA. Both Assertion and Reason are true, but Reason is the correct explanation of AssertionB. Both Assertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true, but Reason is falseD. Assertion is false, but reason is true |
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Answer» Correct Answer - B Disruptive selection is the rarest from of selection which can be very impotant in bringing about evolutionary changes flectuating condition in environment such as season and climate may favour the presence of more than one phenotype within a population This can split a population into two subpopulation if gene flow between the subpopulations is prevented each population may giva rise to a new speices . In some cases disruptive selection can give rise to the appearance of different phenotypes within a population |
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| 4. |
Assertioin Industrial melanism is an example of disruptive selection Reason Evolutionary change in moth is provided by the response of moth species to the directional selection pressure produced by the atmospheric pollutionA. Both Assertion and Reason are true, but Reason is the correct explanation of AssertionB. Both Assertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true, but Reason is falseD. Assertion is false, but reason is true |
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Answer» Correct Answer - D Upto 1848, all reported forms of the preppered moth (Bistone betularia) appeared creamy white with black dots and dark shaded areas in 1848, a black form of moth was recorded in Manchester and by 1895, 98% of peppered moth population in Manchester was black within the last 100 years Darkened forms of about 80 speices of moths have appeared in varying frequencies throughout the United Kingdom. This is a phenomenon known as industrial melaism. It is an example of directional selection in which evolutionary change is provided by the response of moth species to the directional selection pressure prodeced by the atmospheric pollution, which accompanied the industrial revolution |
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| 5. |
Industrial melanism is an example ofA. drug resistanceB. darkening of skin due to smoke from industriesC. protective resemblance with the surroundingsD. defensive adaptation of skin against ultraviolet radiations |
| Answer» Correct Answer - C | |
| 6. |
All the members of a bird population have the same intermediate green colouration. What type of selection is likely to taking place?A. DisruptiveB. DirectionalC. StabilisingD. Natural |
| Answer» Correct Answer - C | |
| 7. |
Stablising selection favours.A. both extreme of a trailsB. intermediate forms a traitC. environmental differencesD. one extreme form over the other extreme form and over intermediate forms of a trait |
| Answer» Correct Answer - B | |
| 8. |
The total collection genes, at any time , in a unit of evolution is called theA. genotypeB. demotypeC. multiple allele groupD. dene pool |
| Answer» Correct Answer - D | |
| 9. |
People who carry an allele for normal haemoglobin and an allele for sickle cell, are resistant to maleria. They are examples ofA. heterozygote advantageB. Extreme diploidyC. outbreedingD. recessive superiority |
| Answer» Correct Answer - A | |
| 10. |
A new mutation spreads from one population,to another by mean ofA. removed bottlenecksB. emigrants and immigrantsC. mutatioan presuresD. cros overs |
| Answer» Correct Answer - B | |
| 11. |
Rapid decline in the population , due to high mortality rate is calledA. population explosionB. population crashC. population densityD. All of above |
| Answer» Correct Answer - B | |
| 12. |
A plant population that reproduces by self pollination is an extreme example pfA. the bottleneck effectB. the founder effectC. rapid gene flowD. assortative mative |
| Answer» Correct Answer - D | |
| 13. |
Which of the following process is/are adaptive?A. genetic driftB. mutationC. Gene flowD. None of the above |
| Answer» Correct Answer - B | |
| 14. |
The relative fitness of different types within a population is probablyA. unchangingB. permanentC. changeableD. both (a) and (C) |
| Answer» Correct Answer - C | |
| 15. |
A deleterious allele decreases more rapidly in frequency, if it isA. recently mutatedB. rareC. dominantD. recessive |
| Answer» Correct Answer - D | |
| 16. |
In which condition the gene ratio remains constant for any species ?A. random matingB. gene flowC. mutationD. sexual selection |
| Answer» Correct Answer - A | |
| 17. |
Species is aA. group immediately below a phylmB. closely related interbreeding populationC. taxonamic division of similar generaD. closely related non- breeding population |
| Answer» Correct Answer - B | |
| 18. |
Adaptation of a species is itsA. metamorphosisB. ecdysisC. acquiredcharacterD. heredity character |
| Answer» Correct Answer - D | |
| 19. |
The name of the experiment performed by lederberg and lederberg isA. replica plating experimentB. tissue cultureC. protoplast fusionD. hybridisation |
| Answer» Correct Answer - A | |
| 20. |
Who performed an experiment to know the genetic basis of adaptations?A. kettlewellB. lederberg and lederbergC. zinder and lederbergD. Hardy and weinberg |
| Answer» Correct Answer - B | |
| 21. |
Which one is the raw material for evolutionaryA. Reshuffling of gene combinationsB. Variability of gene poolC. Unrestricted gene flowD. Balancing selection |
| Answer» Correct Answer - B | |
| 22. |
Balancing selection is connected with the successful reproduction ofA. homozygous resessiveB. homozygous dominantsC. heterozygous individualsD. All of above |
| Answer» Correct Answer - C | |
| 23. |
Which of these is a premating isolating mechanism?A. hybrid sterilityB. temporal isolationC. hybrid isolationD. both (a) and (C) |
| Answer» Correct Answer - D | |
| 24. |
A prezygotic isolating mechanism prevents successfulA. gamete productionB. fertilisationC. zygote developmentD. reproduction of hybrids |
| Answer» Correct Answer - B | |
| 25. |
Members of a biological species are poteincially able toA. competeB. express all the same genesC. introgressD. interbreed |
| Answer» Correct Answer - D | |
| 26. |
When to related population that have been geographically isolated come back into contact, retain their reproductive isolation, and complete for the resources, they may be a divergence in traits known asA. character convergenceB. sibling speciationC. phyletic evolutionD. character displacement |
| Answer» Correct Answer - D | |
| 27. |
The tendency of population to remain in genetic equilibrium may be disturbed byA. random matingB. lack of migrationC. lack of mutationD. lack of random mating |
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Answer» Correct Answer - A According to Hardy-Weinberg equilibrium,allele frequency in a population are stable and constant from generation to generation. In a population , It will remain constant over generation only if the following conditions are met I. There is no mutation, no gene flow and all mating is random II. All genotypes reproduce equally well, i.e. no natural selection. But all these conditions rarely occur in nature |
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| 28. |
Biological concept of species is mainly based onA. reproductive isolationB. morphological features onlyC. methods of reproduction onlyD. |
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Answer» Correct Answer - A Species is a natural inbreeding population which have essentially similar morphological traits are genetically distinct and reproductively isolated from others Reproductive isolation or absence of interbreeding maintains the identity of species . Thus, biological concept of species is mainly based on reproductive isolation |
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| 29. |
Which of the following statement is supported by change in peppered months?A. Natural selection acts on favourable variations, which appear among individualsB. Environment has a role in evolutionC. Acquired characters during life of an individuals are inheritedD. Heritable variations arise due to the changes in the Gene complex |
| Answer» Correct Answer - A | |
| 30. |
Which of the following species are restricted to an area??A. Sibling speciesB. Endemic speciesC. Allopathic speciesD. sympatric species |
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Answer» Correct Answer - B Endemic species are species which are restricted geographically in a particular area at a given time Sibling species are species produced from same parents but they are reproductively isolated from each other Allopatric species are species which share different geographical area, i.e, these are geographically separated from one another Sympatric species are species, which share the same geographical area |
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| 31. |
Most of the 700 species of fruit flies found in the Hawaiian archipelago, are each restricted to a single island. One hypothesis to explain this pattern is that each species diverged after a small number of flies had colonised a new island. This mechanism is calledA. sexual selectionB. genetic equilibriumC. disruptive selectionD. the founder effect |
| Answer» Correct Answer - D | |
| 32. |
The formation of a new species through changes in a single lineage is known asA. anagencsis or phylic evolutionB. cladogenesis or divergent evolutionC. converegent evolutionD. allopatry |
| Answer» Correct Answer - A | |
| 33. |
The formation of two species from one ancestral species is known asA. anagencsis or phylic evolutionB. cladogenesis or divergent evolutionC. converegent evolutionD. allopatry |
| Answer» Correct Answer - B | |
| 34. |
Imagine a population of 100 snails in which shell color is controlled by two alleles, B(black) and b (yellow). What is the number of loci for the Gene for shell colour in this population?A. 3B. 60C. 100D. 200 |
| Answer» Correct Answer - D | |
| 35. |
In a population of large and small flavoured daisies, those with large flowers leave an average of 1000 surviving offsprings, whereas those with small flowers leave an average of only 250 offsprings. The drawnin fitness of large-flowered daisies isA. 1000B. 4C. 1D. 0.25 |
| Answer» Correct Answer - C | |
| 36. |
Interdependent genea, with relative functions, formA. a coadapted gene complexB. an inversionC. a fitness setD. suoer mutation |
| Answer» Correct Answer - A | |
| 37. |
Consider the following processes I. Gene flow II. Non-random mating III. Genetic drift IV. Transduction Which of these is an agent of evolutionary change?A. I and IIB. III and IVC. Only IIID. II and IV |
| Answer» Correct Answer - A | |
| 38. |
In the absence of which of the following the gene frequencies in a Mendelian population ramain constant generation after generation I. Photosynthesis and respiration II. Selection and mutation III. Growth and development IV. Migration and random driftA. I and IIB. II and IIIC. I and IIID. II and IV |
| Answer» Correct Answer - D | |
| 39. |
Which of the following is correct about genetic drift? I.Genetic drift is called as Sewall Wright effect II. Genetic drift increases genetic variability with in a small population IV. Genetic drift is more effective in large populationA. I and IIB. II and IIIC. III and IVD. I and IV |
| Answer» Correct Answer - A | |
| 40. |
Disructive selective usually acts to favourA. both extreme forms of a traitB. intermediate forms of a traitC. environmental differencesD. one extreme form over the other extreme form and over intermediate forms of a trait |
| Answer» Correct Answer - A | |
| 41. |
Under the biological species concept, the main criterion for identifying a species isA. anatomical distinctivenessB. behavioural distinctivenessC. Geographic isolationD. reproductive isolation |
| Answer» Correct Answer - D | |
| 42. |
After the demise of the dinosaurs mammals evovlved rapidly into many new forms because ofA. the founder effectB. a genetic bottleneckC. adaptive radiationD. geological time |
| Answer» Correct Answer - C | |
| 43. |
The forces that change the allele and genotype frequencies of a population areA. RecombinationB. evolutionary agentsC. aquired traitsD. adaptation |
| Answer» Correct Answer - B | |
| 44. |
Origin of new species and genera isA. coevolutionB. microevolutionC. macroevolutionD. megaevolution |
| Answer» Correct Answer - C | |
| 45. |
Genetric drift is a …………… processA. randomB. directedC. selection-deivenD. coevolutionary |
| Answer» Correct Answer - A | |
| 46. |
What are useful for natural selection?A. RecombinationB. Induced mutationsC. Preadaptive mutationsD. Post-adaptive variations |
| Answer» Correct Answer - C | |
| 47. |
Natural selection is best defined as occuring when the environment causesA. differential success in reproductionB. differencial mortalityC. assortative matingD. a reduced gene pool |
| Answer» Correct Answer - A | |
| 48. |
For the M-N blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expanded frequency of M-N group bearing organisms is likely to beA. 0.42B. 0.49C. 0.09D. 0.5 |
| Answer» Correct Answer - A | |
| 49. |
Which of the following increases the number of different alleles in a populationA. crossing overB. Random fusion of gametesC. Gene mutationD. Reassorment of chromosomes in meiosis |
| Answer» Correct Answer - C | |
| 50. |
Accidental fluctuation in alleles of small population is termed asA. demesB. genetic driftC. genetic shiftD. genetic thrift |
| Answer» Correct Answer - B | |